Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual gênero é Led Zeppelin?
 ###Tabelas: CREATE TABLE internal_correspondences (internal_correspondences_id AUTO_INCREMENT PRIMARY KEY, Tongan VARCHAR, Niuean VARCHAR, Sāmoan VARCHAR, Takuu VARCHAR, Tahitian VARCHAR, Rarotongan VARCHAR, Māori VARCHAR, North Marquesan VARCHAR, South Marquesan VARCHAR, Hawai'ian VARCHAR, Mangarevan VARCHAR) CREATE TABLE atp_challenger_tour_and_itf_futures_doubles_titles_17 (atp_challenger_tour_and_itf_futures_doubles_titles_17_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents VARCHAR, Score VARCHAR) CREATE TABLE rankings_table (rankings_table_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Matches as champion INT, Reigns as champion INT, Title matches won* INT, Title last held VARCHAR) CREATE TABLE 250_million_or_more_records (250_million_or_more_records_id AUTO_INCREMENT PRIMARY KEY, Artist VARCHAR, Country of origin VARCHAR, Period active VARCHAR, Release-year of first charted record INT, Genre VARCHAR, Claimed sales VARCHAR) CREATE TABLE 2008_ladder_and_finals (2008_ladder_and_finals_id AUTO_INCREMENT PRIMARY KEY, Benalla DFL VARCHAR, Wins INT, Losses INT, Draws INT, Byes INT, Against INT)  
SELECT Genre FROM 250_million_or_more_records WHERE Artist = led zeppelin